/* packet-usb.c * * $Id$ * * usb basic dissector * By Paolo Abeni * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include typedef enum { URB_CONTROL_INPUT, URB_CONTROL_OUTPUT, URB_ISOCHRONOUS_INPUT, URB_ISOCHRONOUS_OUTPUT, URB_INTERRUPT_INPUT, URB_INTERRUPT_OUTPUT, URB_BULK_INPUT, URB_BULK_OUTPUT, URB_UNKNOWN } urb_type_t; typedef struct usb_header { guint32 urb_type; guint32 device_address; guint32 endpoint_number; guint32 setup_packet; } usb_header_t; typedef struct usb_setup { guint8 bmRequestType; guint8 bRequest; guint16 wValue; guint16 wIndex; guint16 wLength; } usb_setup_t; /* protocols and header fields */ static int proto_usb = -1; static int hf_usb_urb_type = -1; static int hf_usb_device_address = -1; static int hf_usb_endpoint_number = -1; static int hf_usb_request_type = -1; static int hf_usb_request = -1; static int hf_usb_value = -1; static int hf_usb_index = -1; static int hf_usb_length = -1; static int hf_usb_data = -1; static gint usb_hdr = -1; static gint usb_setup_hdr = -1; static const value_string usb_urb_type_vals[] = { {URB_CONTROL_INPUT, "URB_CONTROL_INPUT"}, {URB_CONTROL_OUTPUT,"URB_CONTROL_OUTPUT"}, {URB_ISOCHRONOUS_INPUT,"URB_ISOCHRONOUS_INPUT"}, {URB_ISOCHRONOUS_OUTPUT,"URB_ISOCHRONOUS_OUTPUT"}, {URB_INTERRUPT_INPUT,"URB_INTERRUPT_INPUT"}, {URB_INTERRUPT_OUTPUT,"URB_INTERRUPT_OUTPUT"}, {URB_BULK_INPUT,"URB_BULK_INPUT"}, {URB_BULK_OUTPUT,"URB_BULK_OUTPUT"}, {URB_UNKNOWN, "URB_UNKNOWN"}, {0, NULL} }; static void dissect_usb(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent) { int offset = 0; int type; gboolean setup; proto_tree *tree = NULL; static guint32 src_addr=0xffffffff, dst_addr=0xffffffff; /* has to be static due to SET_ADDRESS */ guint32 tmpaddr; if (check_col(pinfo->cinfo, COL_PROTOCOL)) col_set_str(pinfo->cinfo, COL_PROTOCOL, "USB"); /* add usb hdr*/ if (parent) { proto_item *ti = NULL; ti = proto_tree_add_protocol_format(parent, proto_usb, tvb, 0, sizeof(usb_header_t), "USB URB"); tree = proto_item_add_subtree(ti, usb_hdr); } type = tvb_get_ntohl(tvb, offset); proto_tree_add_item(tree, hf_usb_urb_type, tvb, offset, 4, FALSE); offset += 4; if (check_col(pinfo->cinfo, COL_INFO)) { col_append_fstr(pinfo->cinfo, COL_INFO, "%s", val_to_str(type, usb_urb_type_vals, "Unknown type %x")); } #define USB_ADDR_LEN 4 proto_tree_add_item(tree, hf_usb_device_address, tvb, offset, 4, FALSE); switch(type){ case URB_CONTROL_INPUT: case URB_ISOCHRONOUS_INPUT: case URB_INTERRUPT_INPUT: case URB_BULK_INPUT: src_addr=tvb_get_ntohl(tvb, offset); break; case URB_CONTROL_OUTPUT: case URB_ISOCHRONOUS_OUTPUT: case URB_INTERRUPT_OUTPUT: case URB_BULK_OUTPUT: dst_addr=tvb_get_ntohl(tvb, offset); break; default: break; } offset += 4; SET_ADDRESS(&pinfo->net_src, AT_USB, USB_ADDR_LEN, (char *)&src_addr); SET_ADDRESS(&pinfo->src, AT_USB, USB_ADDR_LEN, (char *)&src_addr); SET_ADDRESS(&pinfo->net_dst, AT_USB, USB_ADDR_LEN, (char *)&dst_addr); SET_ADDRESS(&pinfo->dst, AT_USB, USB_ADDR_LEN, (char *)&dst_addr); proto_tree_add_item(tree, hf_usb_endpoint_number, tvb, offset, 4, FALSE); offset += 4; /* check for setup hdr presence */ setup = tvb_get_ntohl(tvb, offset); offset += 4; if (setup) { proto_item *ti = NULL; proto_tree *setup_tree = NULL; ti = proto_tree_add_protocol_format(parent, proto_usb, tvb, offset, sizeof(usb_setup_t), "URB setup"); setup_tree = proto_item_add_subtree(ti, usb_setup_hdr); proto_tree_add_item(setup_tree, hf_usb_request_type, tvb, offset, 1, FALSE); offset += 1; proto_tree_add_item(setup_tree, hf_usb_request, tvb, offset, 1, FALSE); offset += 1; proto_tree_add_item(setup_tree, hf_usb_value, tvb, offset, 2, FALSE); offset += 2; proto_tree_add_item(setup_tree, hf_usb_index, tvb, offset, 2, FALSE); offset += 2; proto_tree_add_item(setup_tree, hf_usb_length, tvb, offset, 2, FALSE); offset += 2; } proto_tree_add_item(tree, hf_usb_data, tvb, offset, tvb_length_remaining(tvb, offset), FALSE); } void proto_register_usb(void) { static hf_register_info hf[] = { { &hf_usb_urb_type, { "URB type", "usb.urb_type", FT_UINT32, BASE_DEC, VALS(usb_urb_type_vals), 0x0, "URB type", HFILL }}, { &hf_usb_device_address, { "Device", "usb.device_address", FT_UINT32, BASE_DEC, NULL, 0x0, "USB device address", HFILL }}, { &hf_usb_endpoint_number, { "Endpoint", "usb.endpoint_number", FT_UINT32, BASE_DEC, NULL, 0x0, "usb endpoint number", HFILL }}, { &hf_usb_request_type, { "Request Type", "usb.setup.request_type", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }}, { &hf_usb_request, { "Request", "usb.setup.request", FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }}, { &hf_usb_value, { "value", "usb.setup.value", FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }}, { &hf_usb_index, { "Index", "usb.setup.index", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }}, { &hf_usb_length, { "Length", "usb.setup.length", FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }}, { &hf_usb_data, {"Application Data", "usb.data", FT_BYTES, BASE_HEX, NULL, 0x0, "Payload is application data", HFILL }} }; static gint *usb_subtrees[] = { &usb_hdr, &usb_setup_hdr }; proto_usb = proto_register_protocol("USB", "USB", "usb"); proto_register_field_array(proto_usb, hf, array_length(hf)); proto_register_subtree_array(usb_subtrees, array_length(usb_subtrees)); register_dissector("eth", dissect_usb, proto_usb); } void proto_reg_handoff_usb(void) { dissector_handle_t usb_handle; usb_handle = create_dissector_handle(dissect_usb, proto_usb); dissector_add("wtap_encap", WTAP_ENCAP_USB, usb_handle); }